MOAMBE

1997

volume 156 number 3 November-December

 

ASTRONOMY

O. Abuladze, V. Dzhapiashvili, R. Inasaridze, L. Sigua, R. Chigladze

Electropolarimetric and Electrophotometric Investigation of Jupiter's Galilean Satellites

Presented by Academician E. Kharadze, September 8, 1997

ABSTRACT. Polarimetric study of bright satellites of giant planets in Abastumani Observatory was commenced in the sixties. Since 1981 the electropolarimetric and electrophotometric observations on Galilean satellities of Jupiter have been intensified. The data analysis indicates the existence of two points of inversion on the polarization curve of these satellites. One of the points is situated near the opposition (0.5-0.7). For the fixed phase angle and orbital longitude the polarization degree (with absolute meaning) the light reflected from the surfaces of lo, Europa and Ganymede is more, in V filter than in B, while for Callisto it is vice versa. For each satellite the curves of dependence of polarization degree and the light curve on the orbital longitude has two extrema. Besides, the point of maximum of the first curve is near the point of minimum of the second one and on the contrary.

Key words: JUPITER, SATELLITE, 10, EUROPA, GANIMEDE, CALLISTO, ELECTROPOLARIMETRY, ELECTROPHOTOMETRY.

ORGANIC CHEMISTRY

V. Tsitsishvili, B. Vardiashvili, M.Gurdjiev

NMR Study of Sintering Kinetics of Dipping Lacquers Prepared on the Basis of Unsaturated Polyesters

. Presented by Academician T.Andronikashvili, September 8, 1997

ABSTRACT. A study of sintering kinetics of dipping lacquers prepared on the basis of unsaturated polyesters has been carried out with the use of nuclear magnetic resonance spectroscopy.

Key words: DIPPING LACQUER, SINTERING. POLYESTER UNSATURATED, NUCLEAR MAGNETIC RESONANCE (NMR ).

ORGANIC CHEMISTRY

A.Mikautidze, N.Lekishvili, Corr. Member of the Academy L.Khananashvili, L.Asatiani

Polycyclotrimerization of Diethynylsilanes and Properties of Co-Polymers

Presented February 17, 1997

ABSTRACT. The siliconorganic oligophenylenes have been synthesized. The reaction of polycyclotrimerization of some diethylnylsilanes as well as their co-polycyclotrimerization with phenylacetylene and p-diethylnylbenzene in presence of catalysts of the ZiegIer-Natta type were investigated. The general regularities of the reactions of the received siliconorganic oligophenylenes were studied. The influence of the structure and the ratio of the used monomers on the properties of siliconorganic oligophenylenes were established.

Key words: CO-POLYCYCLOTRIMERIZATION, DIETHYNYLSILANE, OLI-GOPHENYLENE.

PHYSICAL CHEMISTRY

S. Gedevanishvili, Z. Munir, Corr. Member of the Academy G. Tsagareishvili

Combustion Synthesis in the Nb-Si System under the Influence of an Applied Elecrtic Field

Presented May 2, 1997

ABSTRACT. Application of an electric field for the activation of self - propagating high - temperature synthesis (SHS) process in the Nb-Si systems has been investigated. It was shown that the combustion mechanism and the final product are influenced by the values of electric field strength. At low field values (7.4 -11.1 V/cm) two types of combustion regime occur for mixtures with compositions Nb/Si = 5/3, steady - state and spin - like, leading to the formation of two different final products:

a - Nb5 Si3/b - Nb5 Si3 and NbSi2/Nb/ a - NB5SI3. With higher field values (14.8 - 18.5 V/cm) the wave propagates in a steady state mode and the product contains only a -Nb5Si3/b - Nb5Si3.

Key words: NIOBIUM SILICIDES, COMBUSTION SYNTHESIS, ELECTRIC FIELD.

PHYSICAL CHEMISTRY

T. Butkhuzi, T. Khulordava, N. Kekelidze, M. Sharvashidze, B. Tsekvava

Synthesis of Wide-Band-Gap A2B6 Compounds by Quasi-Epitaxy Method

Presented by Academician R. Salukvadze, September 15, 1997

ABSTRACT. New technological method of radical-beam bettering epitaxy (RBHE) is represented. This method enables to obtain the samples of II-VI wide-band-gap compounds with given electrical and optical properties. The composition of impurities of LAMMA-spectra are investigated.

Key words: EPITAXY, INCULCATION, ANISOTROPY, ETCHING, PHOTOLU-MINESCENCE.

PHYSICAL CHEMISTRY

L. Khvtisiashvili, M. Katsitadze, Z. Dzotsenidze, G. Bezarashvili, M. Abuladze, R. Tsanava, R. Kobaladze, K. Gaganidze, K. Kasradze

A Study of Ammonia and Carbon Tetrachloride Action on the Inflammation of Detonating Gas

Presented by Academician K. Djaparidze, March 27, 1997

ABSTRACT. The "first limit inflammation" method was used to study the separate and combined action of ammonia and carbon tetrachloride additives on the inflammation of a detonating mixture. It was shown that for the temperature interval (843-903 K), the combined action of ammonia and carbon tetrachloride on the detonating mixture is characterized by an antagonistic effect.

Key words: INFLAMMATION, DETONATING MIXTURE, ANTAGONISTIC EFFECT, SYNERGISM.

 

ELECTROCHEMISTRY

. Marsagishvili, M. Machavariani, M. Janjalashvili, Corr. Member of the Academy J.Japaridze

Investigation of Radiowaves Radiation Mechanisms

Presented May 1, 1997

ABSTRACT. Theoretical base of new experimental method for study the electro-chemical systems is considered. The method is based on the analysis of the electromagnetic radiation of the system in radiowave range. The mechanisms of radiowaves radiation are discussed. The analytic expression for the vector-potential of radiowaves radiation is received, when external variable voltage is impressed on the electrode.

Key words: ELECTROMAGNETIC RADIATION, RADIOWAVES.

CHEMICAL TECHNOLOGY

G. Darsavelidze, D. Gabunia, D. Lezhava, Z. Zoidze, L. Kurashvili

Unelastic Properties of Nickel Alloyed Boron

Presented by Academician G. Gvelesiani, May 1, 1997

ABSTRACT. Temperature dependence of interval friction and shear mudulus of boron-nickel alloys at IHz torsional oscillation in the temperature range from 300 to 1000 has been investigated. In alloys with nickel content from 1.0 to 5.0% in the temperature range 450-500 activation energy decreases from 1.25 to 0.8 eV and frequency factor changes from 11013 to 51011 s-1 . The origin of the maximum is explained by twin boundary migration in (100) plane. An additional maximum has been found in alloys with nickel content ³ 3.5% at 650 with activation energy equal to l.8eV and frequency factor about » 10 14s-1.

It is presumed that the variations of activation parameters of basic relaxation maximum of internal friction in nickel alloyed boron is caused by changes of electron contributions into migration activation energy of twin dislocations.

Key Words. BORON, NICKEL, INTERNAL FRICTION, SHEAR MODULUS.

GEOLOGY

V. Geleishvili, Z.Otkhmezuri

On the Behaviour of Copper in Oxidation Zone of Madneuli Deposit

Presented by Academician N.Skhirtladze, October 30, 1997

ABSTRACT. The peculiarities of behaviour of copper in oxidation zone of Madneuli deposit have been investigated. It has been established, that most secondary minerals of copper are formed by oxidation of chalcopyrites with the exception of cuprite, tenorite and native copper. They are formed by replacment of chalcosine, the mineral of ancient secondary sulphide enrichment subzone in oxygen deficit condition.

Key words: OXIDATION ZONE, COPPER, CHALCOPYRITE.

STRUCTURAL MECHANICS

S.Gelkhvidze

Analysis of High-Level Smoke-Stacks for Dynamic Influences

Presented by Academician A. Dzidziguri December 27, 1996

ABSTRACT. The problem of analysis of smoke-stacks for dynamic influences is considered. Proceeding from the last experience it is necessary to make up new architectural-projectivc and constructional schemes and to refine the models of design of the constructions and the models of external dynamic loading. It will permit us to define the reserves of carrying capacity of the constructions more completely.

Key words: DYNAMIC MATRIX, OSCILLATIONS, SEISMIC AND WIND LOADING.

MACHINE BUILDING SCIENCES

K.Khatiashvili

Moderately Rigidified Stay Cableway Sag Computation

Presented by Corr. Member of the Academy L.Japaridze, July 10, 1997 .

ABSTRACT. The article describes a universal and quick method of calculating sags of a cable system with different levels of rigidity in a stay cableway spans.

Key words: CABLEWAY, SLANTED CABLE, HANGER, SAG.

MACHINE BUILDING SCIENCE

Z.Bogvelishvili

Exploration of Current Dynamical Processes in Transport Car Springs Pneumatic System

Presented by Corr. Member of the Academy I.Jebashvili, July 3, 1997

ABSTRACT. Mathematical model has been elaborated to explorate pneumatic equalizing spring suspension dynamics, which represents system of differential equation and describes current processes of thermodynamical, thermal and mass transmission in research pneumatic system.

Key words: AIR SPRING SUSPENSION, PNEUMATIC SPRING.

AUTOMATIC CONTROL AND COMPUTER ENGINEERING

A. Kobiashvili

Certainty Factors for Uncertainty Management in Expert Systems

Presented by Academician V. Chavchanidze, April, 22, 1997

ABSTRACT. Certainty factors for uncertainty management are considered for the expert systems based on IFTHEN production rules. The formulae for determination certainty factors are given for cases of minimal, average and maximal correlation with condition and conclusion of the production rule.

Key words: EXPERT SYSTEM, CERTAINTY FACTORS, CORRELATION.

 

HUMAN .AND ANIMAL PHYSIOLOGY

Academician T. Oniani, I. Gvilia, N. Darchia, M. Eliava, M. Kochladze

Total Sleep Deprivation Effect on the Sleep-Wakefiilness Cycle in Guinea Pigs

Presented September 29, 1997

ABSTRACT. Studies have demonstrarcd that total sleep deprivation in guinea pigs results in the origination and gradual accumulation of internal need of the body for sleep that is clearly expressed both in the process of sleep and after its deprivation. In this aspect the sleep-wakefulness cycle of guinea pig is subjected to desynchronisation, while "poor" sleep of the guinea pig seems to be associated not with the particularity of the revelant neurophysiological mechanisms, but with the factors which hinder optimal work of the nervous mechanisms of sleep.

Keywords: GUINEA PIG, SLEEP-WAKEFULNESS CYCLE, TOTAL SLEEP DEPRIVATION.

 

HUMAN AND ANIMAL PHYSIOLOGY

G.Kereselidze, Kh.Khorava, A.Sikharulidze, L.Gomelauri, L.Begheladze, N.Kochlashvili

Chemical Irritation of Mediodorsal (n.ND) and Anteroventral Nuclei (n.AV) ofThalamus and Cardiac Muscle Function During Electric Coagulation of Hypothalamus Ventromedian Nucleus (n. VM) under Arterial Normo- and Hypertension Conditions

Presented by Academician I.Oniani, June 21, 1997

ABSTRACT. Thalamus nuclei and their participation in regulation of heart activity is studied. The data presented in the paper indicate functional correlation among thalamo-hypothalamus nuclear formations. Hypertension is supposed to be inducing reorganization of thalamo-cardial realization tracts.

Key words: THALAMUS, MEDIODORSAL, ANTEROVENTRAL, HYPOTHALAMUS, ELECTRO-COAGULATION.

BIOPHYSICS

D. Gogorishvili, Academician M. Zaalishvili

To the "Actin-Like Protein" of Rat Liver Mitochondria

Presented May 5, 1997

ABSTRACT. By the methods of film threads, ATP-ase activity, superprecipitation and viscosimetry it is shown that rat liver mitochondria don't contain "actin-like" protein.

Key words: MITOCHONDRIA, ACTIN, SUPERPRECIPITATION, MYOSIN.

BIOCHEMISTRY

D. Khoshtariya, K. Adeishvili, G. Getashvili, Academician M. Zaalishvili

Dependence of Thermodynamic Melting Parameters of a -Chymotrypsin on the Temperature Scanning Rate: Possible Role of a Stable Intermediate State

Presented August 11, 1997

ABSTRACT. Heat denaturation of of a -chymotrypsin has been studied at different temperature scanning rates using the scanning microcalorimetry method. Calorimetric transition temperature and enthalpy are strongly dependent upon the scanning rate, latter in a biphasic manner, pointing to the complex kinetic origin of the effect, connected probably with the participation of thermodynamically stable intermediate state.

Key words: a-CHYMOTRYPSIN, HEAT DENATURATION, INTERMEDIATE STABLE STATE.

BIOCHEMISTRY

V. Chubinidze, N. Kekelidze, D. Chubinidze

Investigation of Essential Oils and Monoterpene Hydrocarbones of Pine and Fir Trees, Growing in the Abastumani Region

Presented by Corr. Member of the Academy D. Jokhadze, March 20, 1997

ABSTRACT. Essential oils content of pine and fir needless growing in the Abastumani region was studied. Quantitative content of components of monoterpene hydrocarbones of essential oils during the vegetative season has been shown.

Key words: PINE, FIR, MONOTERPENE, HYDROCARBONE.

BIOCHEMISTRY

N. Moseshvili, M. Chachua, G. Alexidze, Corr. Member of the Academy N. Aleksidze

Soluble and Membrane Lectin-Like Proteins from Mentha Pulegium

Presented April 30, 1997

ABSTRACT. The complex sugar binding and D-galacturonic acid specific lectin-like proteins have been identified on Mentha pulegium.

Key words: LECTIN-LIKE PROTEINS, LECTIN ACTIVITY, MENTHA PULEGIUM.

BIOCHEMISTRY

Ò. Arabidze, M. Silagadze, A. Kipiani, L. Pachuashvili

The Effect of Complex Improvers of the Dynamics of Sugar Accumulation in the Process of Wheat Dough Ripening and Baking

Presented by Con". Member of the Academy, January 20, 1997

ABSTRACT. The effect of new complex agent on the dynamics of sugar accumulation in the process of wheat dough ripening and baking is investigated. It has been proved that amylolytic ferments in favourable thermal conditions intensify melanoid reaction and as a result increase the quality of the product.

Key words: REGAINING SUGARS, MELANOID REACTION, AMYLOLYTIC FERMENTS, DOUGH RIPENING, DAIRY ACID BACTERIA.

 

BIOCHEMISTRY

R.Gakhokidze, N.Sidamonidze, L.Tabatadze, A.Gakhokidze, L.Topuria

Acid Transformation of Derivatives of D-xylose

Presented by Academician L.Khananashvili, October 16, 1997

ABSTRACT. Under the action of heating in the presence of lead hydroxide 3.5-0-benzylidene derivative and sulphonyl ethers of D-xylose are converted into 2-deoxy-D-threo-pentonic acid. A number of derivatives of acid have been obtained.

Key words: MOLECULAR REARRANGEMENT, XYLOSE, 2-DEOXY-D-THREO-PENTONIC ACID, LEAD HYDROXIDE.

 

MICROBIOLOGY AND VIROLOGY

I. Chkhaidze, N. Kherkheulidze, N. Mandjavidze, N. Likhoded, M. lakovlev, N. Akhmina

Development of Intestinal Disbacteriosis in Early Aged Children with an Acute Respiratory Viral Infection

Presented by Corr. Member of the Academy V. Bakhutashvili, March 26, 1997

ABSTRACT. A quantitative matter of escherichional microflora in stool was determined in 94 early aged children with acute respiratory viral infection (ARVI). It's shown that ARVI in early aged children is accompanied by development of intestinal disbacteriosis. The development of disbacteriosis correlates with complications. It's also shown that the development of intestinal disbacteriosis is in back dependence on titer of antiendotoxin antibody (antibody with glycolipid of chemotype Re).

Majority of children with ARVI have a decrease of antiendotoxin immunity. In this case it's necessary to be careful to take preventive antibiotics.

Key words: ACUTE RESPIRATORY VIRAL INFECTION, INTESTINAL DISBACTERIOSIS, ENDOTOXIN, ANTIENDOTOXIN ANTIBODY.

BIOCHEMISTRY

I. Beriashvili, T. Chigvinadze

Conversion of Glycolic Acid in Plants

Presented by Corr. Member of the Academy N.Nutsubidze, May 19, 1997

ABSTRACT. It has been shown that radioactive carbon of I14C-glycolic acid in seedlings of kidney bean 3-plant (Phaseolus vulgaris) and maize C^-plant (Zeamays) participates in biosynthesis of organic acids, amino acids and sugars with different intensity.

Key words: GLYCOLIC ACID, CONVERSION, KIDNEY BEAN, MAIZE.

ENTOMOLOGY

E. Didmanidze, N. Mandaria

Attraction of Noctuidae (Lepidoptera) by Ultra-Violet Rays, some of its Peculiarities and Prospects of Application against Injurious Species

Presented by Corr. Member of the Academy B. Kurashvili, July 3,1997

ABSTRACT. The work deals with the application of ultra-violet rays against the injurious species. Researches, carried out in different landscapes of the Trialeti Range, proved that the attraction percentage is far higher in open landscape (steppe, glade), than in the closed one (forest) but in both cases application of the method is effective.

Key words: LEPIDOPTERA, POLYPHAGUE, POLYVOLTURE.

PHYTOPATHOLOGY

M.Chkhaidze

Kiwifruit Diseases in Georgia

Presented by Corr. Member of the Academy B. Kurashvili, May 29, 1997

ABSTRACT. The paper regards the cases of Actinidia diseases in Georgia. Fungus and bacterial microorganisms causing the disease are described.

Key words: FUNGI, BACTERIA, ACTINIDIA DISEASES

CYTOLOGY

T.Abramidze, D.Dzidziguri, M.Zarandia, Corr. Member of the Academy G.Tumanishvili, P.Chelidze

Study ofHepatocyte Nucleolar Factors Regulating Transcription in vitro

Presented July 17, 1997

ABSTRACT. In the present work we have shown that controversial influence on RNA-synthesis of the white rat hepatocyte nucleoli protein fraction was caused by presence of different protein components which could be separated by means of HPLC gel-filtration.

Key words: RRNA-GENES, TRANSCRIPTION FACTOR.

ECOLOGY

L.Purtseladze

Application of Pattern Recognition Theory for Estimation of River Ecological State

Presented by Academician Ts.Mirtskhoulava, August 14, 1997

ABSTRACT. Application of pattern recognition theory, in particular the method of Bayes, for estimation of small rivers ecological state and classification of rivers to realize water protecting measures is valid.

Key words: PATTERN RECOGNITION THEORY, RIVER ECOLOGY, RIVER CLASSIFICATION, RIVER POLLUTION.